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  1. [269]Sappiamo da [26K] che la relazione \(n βŠ† m\) Γ¨ totale in \(β„•\). Dimostrate che

    \begin{equation} βˆ€ n,m∈ β„•, n ∈ m \iff (n βŠ† m ∧ nβ‰  m)\quad . \label{eq:n_ in_ m_ iff_ 2} \end{equation}
    194

    Per [24K] questo implica

    \[ βˆ€ n,m∈ β„•, n βŠ† m \iff (n ∈ m \lor n= m)\quad . \]

    Soluzione 1

    [26B]

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